211102019221 has 2 divisors, whose sum is σ = 211102019222. Its totient is φ = 211102019220.

The previous prime is 211102019209. The next prime is 211102019231. The reversal of 211102019221 is 122910201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107987818225 + 103114200996 = 328615^2 + 321114^2 .

It is a cyclic number.

It is not a de Polignac number, because 211102019221 - 2¹¹ = 211102017173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211102019192 and 211102019201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211102019231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105551009610 + 105551009611.

It is an arithmetic number, because the mean of its divisors is an integer number (105551009611).

Almost surely, 2^211102019221 is an apocalyptic number.

It is an amenable number.

211102019221 is a deficient number, since it is larger than the sum of its proper divisors (1).

211102019221 is an equidigital number, since it uses as much as digits as its factorization.

211102019221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 211102019221 in words is "two hundred eleven billion, one hundred two million, nineteen thousand, two hundred twenty-one".